The national speed limit in the United States was reduced to 55 mph in 1974.Proponents and critics of this legislation have looked at the number of traffic fatalities on each of the major U.S.highways (e.g.,I-90,I-65,I-75)for the years preceding and following this legislation.The examination of traffic fatalities on each of the various highways illustrates the use of
A)pretest-posttest one-group design.
B)the time-series design.
C)the multiple time-series design.
D)the nonequivalent control group design.
E)the one-shot case study.

Question

Quizplus · Accepted Answer

The examination of traffic fatalities on each of the various highways before and after the implementation of the national speed limit law involves comparing multiple time-series data points. This design is referred to as the multiple time-series design.

The National Speed Limit in the United States Was Reduced